I have one of two sides that is very difficult to get started to slide on a plastic track. In fact, I pulled a glued-on door handle thingy right off the glass twice. I tried lubricating the edge of the glass, which is the kind with the plastic in the middle (safety glass?) and it still gets stuck. Should I try to sand the edge, like to re-bevel it? The cutter used a sanding disc to round it off, so it is not exact or perfect. The other side moves great. I did try flipping it over and all that too.


